How long before Final flush?

that looks like a Sativa, they don't get big bud clusters and you've got several weeks to go like maybe up to 8 more.
Some cameras can't focus too close. Check your camera manual and see if it has a "macro" setting.
Ayways I start cutting my nutrients back when I start seeing hairs turn red on the oldest flower, every week I half the dosage from the previous week.

I give my plants at least 2 weeks without nutes. I agree they look very sativa like, which as said will grow much looser buds than a heavy indica. However in my experience sativas tend to grow in with very big/swollen bracts(what most people incorrectly call calix). Where as heavy indicas tend to grow a bud that looks kinda small and then the bracts will swell in the last like 3 weeks.